(function () {
    'use strict';
    angular.module('core.service')
        .factory('FileReaderService', ["$q", "$log", function ($q, $log) {
            var onLoad = function (reader, deferred, scope) {
                return function () {
                    scope.$apply(function () {
                        deferred.resolve(reader.result);
                    });
                };
            };

            var onError = function (reader, deferred, scope) {
                return function () {
                    scope.$apply(function () {
                        deferred.reject(reader.result);
                    });
                };
            };

            var getReader = function (deferred, scope) {
                var reader = new FileReader();
                reader.onload = onLoad(reader, deferred, scope);
                reader.onerror = onError(reader, deferred, scope);
                return reader;
            };

            var readAsDataURL = function (file, scope) {
                var deferred = $q.defer();
                var reader = getReader(deferred, scope);
                reader.readAsDataURL(file);
                return deferred.promise;
            };

            return {
                readAsDataUrl: readAsDataURL
            };
        }]
    )
})();